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http://dx.doi.org/10.7837/kosomes.2012.18.3.193

Long Term Changes Pattern in Marine Ecosystem of Korean Waters  

Rahman, S.M.M. (Department of Marine Bioscience, Gangneung-Wonju National University)
Lee, Chung-Il (Department of Marine Bioscience & Technology, Gangneung-Wonju National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.18, no.3, 2012 , pp. 193-198 More about this Journal
Abstract
Long term changes in winter time(JFM) sea surface temperature(SST) and marine ecosystem of different Korean waters during last five to six decades were illustrated. Fishing intensity with climate-ocean variability(e.g. SST) have been increasing since 1970s in all of the Korean marine waters. Winter SST around Korean waters went to colder regime in early 1980s and after the late 1980s increased gradually. After 1988/89 CRS all of the waterbody started warmer regime and well coincided with the CRS phenomena. Large predatory, small pelagic and crustacean and mollusks abundance were well coincided by the warmer SST regime after 1988/89 CRS and changed the fishery from demersal fishery to pelagic fishery. Ecosystem parameter of Mean Trophic Level(MTL) showed continuous decreasing trend since mid of 1970s which was mostly affected by the increasing of lower trophic level species. Fishing in balance(FIB) index showed increasing pattern since early 1970s to the late of 1970s and from early 1980s it was almost stable until now. Finally wasp-waist population of anchovy and Japanese sardine have a greater impact to the whole MTL since early 1970s.
Keywords
Ecosystem structure; Climate regime shift; Pelagic fishery; Demersal fishery; Mean trophic level;
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